Exact model

Texas Hold’em: a straight

Probability:
4.62%
Odds:
1 to 21
dBan
−13.1 dBan

Five consecutive ranks become the best hand in about one seven-card deal out of 22.

Calculation

p = 6,180,020 exact straight hands / C(52, 7) = 6,180,020 / 133,784,560

Assumptions

A standard 52-card deck has no jokers. Two private cards and five community cards are dealt with no cards known in advance. The best five of seven cards sets the exact category, so stronger categories are excluded. Folding, opponents, and the chance of winning are outside this model.

Sources

  1. Brian Alspach: seven-card poker frequencies
  2. PokerStars: Texas Hold’em rules